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how to write to the end of a file in python

file = open('sample.txt', 'a') #the important part is to open it in mode 'a'
#when you open a file in mode 'a' it start writing at the end of it
file.write("yes you are")  

#lets say the file contained this string "i am a file "
#so after we executed line 3 the string will be "i am a file yes you are"

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how to write to the end of a file in python

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